Light-shielding material for optical instrument and manufacturing method thereof
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United States of America Patent
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Aug 2, 2016
Grant Date -
Jan 16, 2014
app pub date -
Feb 29, 2012
filing date -
Mar 28, 2011
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Abstract
Provided is a method of manufacturing a light-shielding material for use in optical instrument and having a light-shielding coat with a broad low-gloss region while maintaining the physical properties, such as a light-blocking property, necessary for light-shielding coat. In this method for manufacturing a light-shielding material comprising a light-shielding coat formed on the substrate, a coating liquid is prepared containing at least a binder resin, black fine particles and a matting agent having a variation coefficient of 20 or larger. Next, this coating liquid is coated on the substrate and dried to form a light-blocking coat.
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